Abstract
Generally throughout eastern Canada, wood borers of the genus Monochamus present the greatest single theat to softwood logs that must remain in the woods thrnughoat the summer and to standing trees killed as a result of fire or other disturbance. Althoush a considerable body of literature has been accumulated on the general biology and taxonomy of rlie econonucally important species (4, 5, 11, 15), on the ainount of damage caused by them under particular circumstances (2, 12), and on the protection of logs from damage (1, 3, 10, 13, 14), comparatively little detail is available on their seasonal development.